A Giant Telescope Grows in Space

Everything is going great for the James Webb Space Telescope. So far.

Astronomers are starting to breathe again.

Two weeks ago, the most powerful space observatory ever built roared into the sky, carrying the hopes and dreams of a generation of astronomers in a tightly wrapped package of mirrors, wires, motors, cables, latches and willowy sheets of thin plastic on a pillar of smoke and fire.

On Saturday, the observatory, the James Webb Space Telescope, completed a final, crucial step around 10:30 a.m. by unfolding the last section of its golden, hexagonal mirrors. Nearly three hours later, engineers sent commands to latch those mirrors into place, a step that amounted to it becoming fully deployed, according to NASA.